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Old 02-10-2013, 05:46 PM   #1
Scooby Newbie
Member#: 343734
Join Date: Jan 2013
Default Twin injectors per cylinder

So has anyone made a twin injectors setup for there Scooby ??
I only ask as I'm fitting a DTA ECU that has 8 injector drivers, and was just thinking out loud ??

Would the lower end drive ability be better seeing as your nor using 1000cc injectors just for tick over ??

Could even fit a race gass cell in the Boot for the other injectors maybe....

Please don't shoot me down, just constructive banter please....


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gtrclive is offline   Reply With Quote
Old 02-10-2013, 06:01 PM   #2
Scooby Newbie
Member#: 307299
Join Date: Jan 2012

its been done. aps if i recall correctly made a set of tgv deletes with room for 8 injectors. (4 per side).

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Old 02-10-2013, 06:03 PM   #3
Scooby Guru
Member#: 32669
Join Date: Feb 2003
Chapter/Region: SCIC
Location: Rancho C
2007 2.34LR, EFR7670
LINK G4 hybrid STi


If you can get the APS TGV's they had bosses in them to run a second set of injectors. I've also seen people modify intake manifolds to take a second set of injectors so it has been done before.

Now as to how you plan on controlling them, that's another story. I've seen single-point, multi-point, sequential, group/staged, and sequential/staged control for fueling control in my ECU but never anything like you describe like shutting one set down completely to run the second set on another fuel. Have you looked to see if the DTA ECU could handle something like that?
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Old 02-10-2013, 06:53 PM   #4
Scooby Newbie
Member#: 343734
Join Date: Jan 2013

The way I've seen it mapped before you leave the normal injectors on at say a ceiling of 80% duty then start to run the 2 set at the same time, you start to get a boost in Octane level, and might have to use a transient table to help.... but basicaly use all 8 at once...
gtrclive is offline   Reply With Quote
Old 02-10-2013, 07:07 PM   #5
Scooby Newbie
Member#: 343734
Join Date: Jan 2013

I think there's also an advantage at the higher rpm's to have the second set of injectors further up the manifold, giving the fuel more time to atomise. Most Pure race engine's used to have the injectors above the throttle bodies (Dribble on butterfly I think they used to call it)

like this :-


and I know the DB9R Le Mans car used it aswell.....
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Old 02-11-2013, 08:13 PM   #6
Scooby Newbie
Member#: 163631
Join Date: Nov 2007
Chapter/Region: NWIC
Location: Seattle
07 Forester XT
Dom 1.5XT-R


would be cool to have dedicated injectors at each cylinder for meth/water injection, then you would know each cylinder is getting the same mix.
northman is offline   Reply With Quote
Old 02-12-2013, 12:51 AM   #7
Uncle Scotty
Scooby Guru
Member#: 16200
Join Date: Mar 2002
OK Houston
we have an Uncle


most of all of this is because racecar
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